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Linshizhi
ffmpeg.wasm-core
Commits
f707a5eb
Commit
f707a5eb
authored
Apr 20, 2005
by
Michael Niedermayer
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buffer overflows
Originally committed as revision 4142 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
856dbbff
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Showing
1 changed file
with
15 additions
and
3 deletions
+15
-3
indeo2.c
libavcodec/indeo2.c
+15
-3
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libavcodec/indeo2.c
View file @
f707a5eb
...
...
@@ -53,7 +53,7 @@ if (value > 255) \
else if (value < 0) \
value = 0; \
static
void
ir2_decode_plane
(
Ir2Context
*
ctx
,
int
width
,
int
height
,
uint8_t
*
dst
,
int
stride
,
static
int
ir2_decode_plane
(
Ir2Context
*
ctx
,
int
width
,
int
height
,
uint8_t
*
dst
,
int
stride
,
const
uint8_t
*
table
)
{
int
i
;
...
...
@@ -62,11 +62,16 @@ static void ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *ds
int
c
;
int
t
;
if
(
width
&
1
)
return
-
1
;
/* first line contain absolute values, other lines contain deltas */
while
(
out
<
width
){
c
=
ir2_get_code
(
&
ctx
->
gb
);
if
(
c
>
0x80
)
{
/* we have a run */
c
-=
0x80
;
if
(
out
+
c
*
2
>
width
)
return
-
1
;
for
(
i
=
0
;
i
<
c
*
2
;
i
++
)
dst
[
out
++
]
=
0x80
;
}
else
{
/* copy two values from table */
...
...
@@ -82,6 +87,8 @@ static void ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *ds
c
=
ir2_get_code
(
&
ctx
->
gb
);
if
(
c
>
0x80
)
{
/* we have a skip */
c
-=
0x80
;
if
(
out
+
c
*
2
>
width
)
return
-
1
;
for
(
i
=
0
;
i
<
c
*
2
;
i
++
)
{
dst
[
out
]
=
dst
[
out
-
stride
];
out
++
;
...
...
@@ -99,16 +106,20 @@ static void ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *ds
}
dst
+=
stride
;
}
return
0
;
}
static
void
ir2_decode_plane_inter
(
Ir2Context
*
ctx
,
int
width
,
int
height
,
uint8_t
*
dst
,
int
stride
,
static
int
ir2_decode_plane_inter
(
Ir2Context
*
ctx
,
int
width
,
int
height
,
uint8_t
*
dst
,
int
stride
,
const
uint8_t
*
table
)
{
int
j
;
int
out
=
0
;
int
c
;
int
t
;
if
(
width
&
1
)
return
-
1
;
for
(
j
=
0
;
j
<
height
;
j
++
){
out
=
0
;
while
(
out
<
width
){
...
...
@@ -129,6 +140,7 @@ static void ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8
}
dst
+=
stride
;
}
return
0
;
}
static
int
ir2_decode_frame
(
AVCodecContext
*
avctx
,
...
...
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